vim: Import v8.2.4832

* 8.2.4832: passing zero instead of NULL to a pointer argument
* 8.2.4831: crash when using maparg() and unmapping simplified keys
* 8.2.4830: possible endless loop if there is unused typahead
* 8.2.4829: a key may be simplified to NUL
* 8.2.4828: fix for unmapping simplified key not fully tested

gitlog.txt

@@ -1 +1 @@
-* [8.2.4827](https://github.com/vim/vim/commit/87f74106f96737e7b8ceaafe1a131aa718077de6): typo in variable name\n* [8.2.4826](https://github.com/vim/vim/commit/1f435dafff2452e0b55d1ca457ce7402e526e92a): .cshtml files are not recognized\n* [8.2.4825](https://github.com/vim/vim/commit/09661203ecefbee6a6f09438afcff1843e9dbfb4): can only get a list of mappings\n* [8.2.4824](https://github.com/vim/vim/commit/23d5770ef5e2f5c6d20d123303b81327045e5a1e): expression is evaluated multiple times\n* [8.2.4823](https://github.com/vim/vim/commit/372bcceeee8012ef3fb2f3dbc8132c3a33cb84fc): concat more than 2 strings in :def function is inefficient
+* [8.2.4832](https://github.com/vim/vim/commit/fc78a0369e0d371a1a85d07045ff25d8695e8f8c): passing zero instead of NULL to a pointer argument\n* [8.2.4831](https://github.com/vim/vim/commit/2c8a7ebdad9da017bfb6dc8a0f46acea77ec2e17): crash when using maparg() and unmapping simplified keys\n* [8.2.4830](https://github.com/vim/vim/commit/23f106efeb64eadd95adee34144f64526aa5f61f): possible endless loop if there is unused typahead\n* [8.2.4829](https://github.com/vim/vim/commit/17c95d9608370559441bb73941ba6d9a4b6b26bd): a key may be simplified to NUL\n* [8.2.4828](https://github.com/vim/vim/commit/abeb09b2c53054513812d1e56716e2a5abe8f354): fix for unmapping simplified key not fully tested